Plainfield Township, PA demographics:
population, income, and more

Total population
13,501
-0.3% year-over-year change
Median household income
$92,054/yr
1.2% year-over-year change
Housing units
5,575
3.7% year-over-year change

Plainfield population

How many people live in Plainfield

Plainfield is home to 13,501 residents, according to the most recent Census data. Gender-wise, 48.6% of Plainfield locals are male, and 51.4% are female.

Total population
13,501
-0.3% year-over-year change
Gender ratio
Male
48.6%
6,562
Female
51.4%
6,939
Value Percent YoY change
Male 6,562 48.6% -2.7%
Female 6,939 51.4% 2.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Plainfield is 46, with the population distributed as follows: about 15.2% are children under 15, then 11.5% are in the 15 to 24 age group. Adults between 25 and 44 make up 21.8% of the population, while another 28.9% fall into the 45 to 64 bracket. Finally, around 22.6% are 65 or older.

Median age
46
Age breakdown
Under 15
15.2%
15 to 24
11.5%
25 to 44
21.8%
45 to 64
28.9%
Over 65
22.6%
Value Percent YoY change
Under 15 2,058 15.2% -3.2%
15 to 24 1,551 11.5% -8.4%
25 to 44 2,937 21.8% 3.3%
45 to 64 3,902 28.9% -0.5%
Over 65 3,053 22.6% 3.3%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Plainfield, 93% of the population are US-born citizens, while 5.2% have gained naturalized citizenship. At the same time, 1.8% of residents are non-citizens. As for race, 88.6% of locals are Caucasian, 2.7% are African American and 2.4% have Asian roots. There’s also a share of 4.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
93%
Non-U.S.-born citizens
5.2%
Non-citizens
1.8%
Value Percent YoY change
U.S.-born citizens 12,556 93% -0.7%
Non-U.S.-born citizens 700 5.2% 0.0%
Non-citizens 244 1.8% 19.0%
Racial breakdown
White
88.6%
Black or African American
2.7%
American Indian and Alaska Native
0.2%
Asian
2.4%
Native Hawaiian and other Pacific Islander
0%
Two or more races
4.8%
Other
1.4%
Value Percent
White 11,959 88.6%
Black or African American 365 2.7%
American Indian and Alaska Native 23 0.2%
Asian 323 2.4%
Two or more races 646 4.8%
Other 183 1.4%

Households in Plainfield

A peek inside Plainfield households

Plainfield has 5,284 households, with an average of 3 members in each. Of these, 72.8% are families, while the remaining 27.2% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
5,284
3.0% year-over-year change
Average people per household
3
Non-family households
1,436
Family households
3,848
Value Percent YoY change
Non-family households 1,436 27.2% 8.0%
Family households 3,848 72.8% 1.3%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Plainfield

The housing landscape of Plainfield

Plainfield's housing consists of 5,575 units, with 63% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 20.2% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 3% of the housing landscape.

Housing units
5,575
3.7% year-over-year change
Housing types
Value Percent
1 unit, detached 3,511 63%
1 unit, attached 1,129 20.2%
2 units 302 5.4%
3 or 4 units 178 3.2%
5 to 9 units 140 2.5%
10 to 19 units 21 0.4%
20 to 49 units 78 1.4%
50 or more units 52 0.9%
Mobile home 165 3%
Homes built since 2020
85
107.3% year-over-year change

The age of buildings in Plainfield

In Plainfield, the median construction year is 1974. About 30.3% of homes were built before the 1940s, with another 3.5% going up by 1949. Most development happened in the second half of the 20th century. Then, 12.1% of homes were added from 2000 to 2009, 7.2% between 2010 and 2019, and 1.5% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 1,688 30.3% 6.2%
Built between 1940 and 1949 194 3.5% 11.5%
Built between 1950 and 1959 374 6.7% 0.5%
Built between 1960 and 1969 473 8.5% -4.8%
Built between 1970 and 1979 542 9.7% 2.9%
Built between 1980 and 1989 613 11% 11.9%
Built between 1990 and 1999 525 9.4% -11.3%
Built between 2000 and 2009 677 12.1% -1.5%
Built between 2010 and 2019 404 7.2% 14.8%
Built in 2020 or later 85 1.5% 107.3%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Plainfield occupancy rates

Out of the 5,284 occupied housing units in Plainfield, 76.5% are owner-occupied, while 23.5% are lived in by tenants. Meanwhile, 5.2% of all homes on the local market sit vacant.

Occupied housing units
5,284
3.0% year-over-year change
Occupancy breakdown
Renter occupied
1,240
Owner occupied
4,043
Value Percent YoY
change
Renter occupied 1,240 23.5% 2.0%
Owner occupied 4,043 76.5% 3.4%
Unoccupied housing units
5.2%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Plainfield housing costs

Housing costs in Plainfield come to a median of $1,388 per month, while tenants specifically pay a median gross rent of $1,376.

Median housing costs per month
$1,388/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Plainfield
$1,376/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Plainfield

Plainfield education at a glance

About 41.1% of the population in Plainfield went to high school, while 16.9% pursued college studies. Another 10.9% earned an associate degree and 18.5% hold a bachelor’s. Meanwhile, 11% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 177 1.6% -3.3%
High school diploma 4,523 41.1% -2.4%
College diploma 1,856 16.9% 4.0%
Associate degree 1,200 10.9% 8.3%
Bachelor's degree 2,037 18.5% 0.6%
Graduate degree 1,211 11% 2.2%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Plainfield

How much people earn in Plainfield

The average annual household income in Plainfield was $113,749 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +5.9% change from the previous year. At the same time, the median income stood at $92,054, reflecting a +1.2% shift over the same period.

Average household income in Plainfield
$113,749/year
5.9% year-over-year change
Median household income in Plainfield
$92,054/year
1.2% year-over-year change

Plainfield income by age

In Plainfield, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $116,160. Those with someone between 45 and 64 in charge, often well established professionally, earn $117,310 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $71,025, while those led by someone over 65, many of whom may be retired, have about $64,016 in earnings. Overall, 91.5% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $71,025 4.9%
25 - 44 $116,160 5.3%
45 - 64 $117,310 2.6%
Over 65 $64,016 2.0%
Above poverty level
12,022
Below poverty level
1,118
Value Percent YoY
change
Above poverty level 12,022 91.5% -0.3%
Below poverty level 1,118 8.5% -2.2%

Employment in Plainfield

Workforce and job types in Plainfield

The job market in Plainfield is powered by 6,793 working residents, spread across a range of industries and roles. 74.3% of the working population are employed in professional or administrative positions, while 25.7% are in hands-on or service-based jobs. Also, 7.1% run their own businesses, 68.2% are employed by private companies, and 12.7% work in the public sector.

Workforce demographics

Working population
6,793
1.3% year-over-year change
White collar
5,048
Blue collar
1,744
Value Percent YoY change
White collar 5,048 74.3% -1.8%
Blue collar 1,744 25.7% 11.4%
Employer type
Self employees
7.1%
Private companies
68.2%
Governmental workers
12.7%
Not for profit companies
12%
Value Percent YoY change
Self employees 481 7.1% 15.1%
Private companies 4,634 68.2% -1.0%
Governmental workers 863 12.7% 3.2%
Not for profit companies 815 12% 5.7%
Unemployment rate
3.4%
-22.6% year-over-year change

Available workforce

The unemployment rate in Plainfield stands at 3.4%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Plainfield

How people get around in Plainfield

In Plainfield, the average commute time is 3 minutes. Commuting methods vary: 98.8% of residents travel by personal vehicle and 1% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
3 min
Means of transportation
Value Percent YoY change
Car 5,858 98.8% 0.0%
Taxicab 3 0% -25.0%
Bus or trolleybus 1 0% -75.0%
Motorcycle 3 0% 0.0%
Bicycle 8 0.1% N/A
Walk 58 1% 38.1%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Plainfield by zipcode?

Zipcode Population Number of households Median income Average income
18091 6,547 2,673 $80,464 $100,057
18040 17,256 6,668 $107,016 $133,750
18064 26,970 10,477 $103,393 $124,031
18072 6,938 2,729 $80,716 $106,207

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FAQs about Plainfield demographics 

What is the total population of Plainfield?

Plainfield has a total population of 13,501 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.3% compared to a year ago.

What is the gender ratio in Plainfield?

The gender ratio in Plainfield is as follows:
  • 48.6% males (6,562 residents)
  • 51.4% females (6,939 residents)

What is the median age in Plainfield?

The median age in Plainfield is 46.

What is the age distribution of the population in Plainfield?

The age distribution in Plainfield is as follows:
  • Under 15: 15.2% (2,058 residents)
  • Ages 15-24: 11.5% (1,551 residents)
  • Ages 25-44: 21.8% (2,937 residents)
  • Ages 45-64: 28.9% (3,902 residents)
  • Over 65: 22.6% (3,053 residents)

What is the racial and ethnic makeup of Plainfield?

The racial and ethnic makeup of Plainfield is as follows:
  • White: 88.6% (11,959 residents)
  • Black or African American: 2.7% (365 residents)
  • American Indian and Alaska Native: 0.2% (23 residents)
  • Asian: 2.4% (323 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 4.8% (646 residents)
  • Other: 1.4% (183 residents)

What percentage of the population in Plainfield are U.S.-born citizens?

U.S.-born citizens represent 93% of the population in Plainfield.

How many housing units are there in Plainfield?

There are 5,575 housing units in Plainfield, reflecting a +3.7% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Plainfield and what is the average household size?

Plainfield has a total of 5,284 households, with an average of 3 people in each.

What is the median household income in Plainfield?

Plainfield has a median household income of $92,054, representing a +1.2% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Plainfield?

The employment rate is 96.6% in Plainfield, with a workforce of 6,793 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 74.3% (5,048 residents)
  • Blue-collar workers: 25.7% (1,744 residents)

Places of employment:
  • Self-employed: 7.1% (481 residents)
  • Private companies: 68.2% (4,634 residents)
  • Governmental workers: 12.7% (863 residents)
  • Not-for-profit companies: 12% (815 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025